An image recording apparatus includes a roller pair for transporting a sheet, a recording head, and a controller. The controller determines a linefeed amount by which the sheet is transported by the roller pair between corresponding two adjacent passes of the recording head. The controller executes image recording on the sheet by alternately repeating a linefeed operation for rotating the roller pair by the determined linefeed amount to transport the sheet in a transport direction, and a pass recording operation in which the controller causes the roller pair to stop and the recording head to perform a pass and to record part of an image on the sheet. Upon determining that a linefeed operation would cause the sheet to travel past the roller pair while the roller pair is decelerating, replace for the linefeed operation a determined linefeed amount by an adjusted linefeed amount.

A recording apparatus is provided with a transport roller pair which transports a medium toward a recorder, a feed roller which transports the medium toward the transport roller pair, and a controller which controls the transport roller pair and the feed roller. The controller is capable of executing a combined skew rectification mode which executes one of a first skew rectification operation in which a leading end of the medium abuts the transport roller pair using backward rotation of the transport roller pair and forward rotation of the feed roller and a second skew rectification operation in which the transport roller pair to rotate backward without driving the feed roller and discharges the leading end of the medium to the upstream side of the transport roller pair, and subsequently executes the other of the skew rectification operations.

A transport apparatus includes a feed unit as an example of a supply unit which supplies a medium in a transport direction, and a transport unit which transports the medium supplied from the feed unit. The transport unit includes a transport roller (a driving roller) which sends the medium, and a driven roller which nips the medium between the transport roller and the driven roller. The driven roller is movable in the transport direction relative to the transport roller.

A system and method for consistent paper movement includes a pick/feed motor configured to rotate a pick/feed roller of a print engine to deliver a sheet of paper to the registration nip of a registration roller. A first sensor and a second sensor disposed in the paper path between the pick/feed roller and the registration roller detect the leading edge of the paper. A controller receives sensor data from the first and second sensors and compares the sensor data with expected times for receiving the sensor data. When the received sensor data indicates that the paper is lagging or leading, the controller calculates a period of time to drive the drive the pick/feed motor at a higher or lower speed to compensate for the lagging or leading of the paper.

A sheet processing apparatus includes a roller pair configured to convey a sheet, a sheet bundle conveyer configured to convey a sheet bundle to the roller pair, and circuitry configured to cause the sheet bundle conveyer to contact leading edges of sheets of the sheet bundle to the roller pair and cause the roller pair to rotate in reverse to align the leading edges of the sheets of the sheet bundle.

An image formation device includes: a registration roller pair configured to shift sheet in a second direction perpendicular to a first direction of a sheet feeding direction while holding the sheet; a feeding section provided upstream of the registration roller pair in the first direction and including a feeding belt configured to convey the sheet to the registration roller pair; a first air adjustment section configured to perform air suction or blowing for the sheet conveyed by the feeding belt; and a control section configured to switch between a first operation of controlling, when the sheet is conveyed by the feeding belt, the first air adjustment section to suck the sheet with air and a second operation of controlling, when the sheet is swung by the registration roller pair, the first air adjustment section to blow air on the sheet.

A sheet conveying apparatus includes first and second roller members fixed to a rotatable shaft, a first follower roller that cooperates with the first roller member to form a conveying nip, and a second follower roller that cooperates with the second roller member to form a conveying nip. The first and second roller members have outer periphery cut-away parts and the first and second follower rollers are moveably supported and can be biased to home positions. If the first roller member cut-away part faces the first follower roller, the first follower roller is biased to move toward a home position while the nip of the second roller member nips and conveys a sheet. If the second roller member cut-away part faces the second follower roller, the second follower roller is biased to move toward a home position while the nip of the first roller member nips and conveys a sheet.

A sheet transporting apparatus is provided, including a transport mechanism provided with a roller, a motor, a controller, and a measuring input unit, wherein a transport route has a curved area for inverting the sheet, and the controller is constructed such that the control on the motor is executed by a closed loop control system by using a measured value of an control output at an initial stage of the transport of a sheet from a tray, and the control on the motor is switched from the control performed by the closed loop control system to control performed by an open loop control system on condition that a preset phenomenon arises after the sheet is taken out of the tray.

A transport apparatus includes a feed unit as an example of a supply unit which supplies a medium in a transport direction, and a transport unit which transports the medium supplied from the feed unit. The transport unit includes a transport roller (a driving roller) which sends the medium, and a driven roller which nips the medium between the transport roller and the driven roller. The driven roller is movable in the transport direction relative to the transport roller.

A sheet conveying apparatus includes first and second roller members fixed to a rotatable shaft, a first follower roller that cooperates with the first roller member to form a conveying nip, and a second follower roller that cooperates with the second roller member to form a conveying nip. The first and second roller members have outer periphery cut-away parts and the first and second follower rollers are moveably supported and can be biased to home positions. If the first roller member cut-away part faces the first follower roller, the first follower roller is biased to move toward a home position while the nip of the second roller member nips and conveys a sheet. If the second roller member cut-away part faces the second follower roller, the second follower roller is biased to move toward a home position while the nip of the first roller member nips and conveys a sheet.